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            <td class="headertitle">MATLAB File Help: gqrs</td>
            <td class="subheader-left"><a href="gqrs.m">View code for gqrs</a></td>
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function varargout=gqrs(varargin)

 gqrs(recordName,N,N0,signal,threshold,outputName,highResolution)

    Wrapper to WFDB GQRS:
         http://www.physionet.org/physiotools/wag/gqrs-1.htm

    Creates a SQRS annotation file  at the current MATLAB directory.
    The detector algorithm is new and as yet unpublished.
    The annotation file will have the same name as the recorName file,
    but followed with the *.qrs suffix. Use RDANN to read the annoations
    into MATLAB's workspace in order to read the sample QRS locations.

    If recordName is the path to a record at PhysioNet's database, than
    the annation files will be stored in a subdirectory with the same relative
    path as recordName and under the current directory.

    NOTE: In order to read the generated annotation file using RDANN, it is
    necessary to have the WFDB record (*.hea and *.dat) files in the same
    directory as the annotation file.

 Required Parameters:

 recorName
       String specifying the name of the record in the WFDB path or
       in the current directory.


 Optional Parameters are:

 N
       A 1x1 integer specifying the sample number at which to stop reading the
       record file (default read all = N).
 N0
       A 1x1 integer specifying the sample number at which to start reading the
       annotion file (default 1 = begining of the record).

 signal
       A 1x1 integer. Specify the singal to obtain the annotation (default
       = 1, first signal).

 threshold
       A 1x1 double. Specify the detection threshold (default = 1.00).
       If too many beats are missed, decrease threshold,
       if there are too many extra detections, increase threshold.

 outputName
       String. Save the ouput annotation file extension as *.outputName (default =
       *.qrs).

 highResolution
       Boolean. If false (0), does not read multifrequency signals in high
       resolution mode.


 Source code by George B. Moody

 MATLAB wrapper written by Ikaro Silva, 2013
 Last Modified:  December 10, 2013
 Version 1.0
 See also SQRS, RDANN, WQRS, BXB
 Since 0.9.5

 %Example
 N=5000;
 gqrs('mitdb/100',N);
 ann=rdann('mitdb/100','qrs',[],N);
 [tm,sig]=rdsamp('mitdb/100',[],N);
 plot(tm,sig(:,1));hold on;grid on
 plot(tm(ann),sig(ann,1),'ro')
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